NCIt definition : A second generation synthetic oligonucleotide with immunomodulatory and potential
antineoplastic activities. HYB2055 consists of unmethylated CpG dinucleotide motifs
that are present abundantly in bacterial and parasitic DNA, and a novel DNA structure,
called an immunomer that contributes to metabolic stability of the agent. Upon infections,
CpG-containing DNA released from pathogenic organisms triggers host immune responses,
which are mediated by the action of intracellular toll-like receptor 9 (TLR9), a pattern
recognition receptor. This agent mimics bacterial DNA and selectively activates TLR9,
thereby initiating immune signaling pathways, and leading to activation of B-cells
and dendritic cells and induction of Th1-type cytokine production.;